Hobby Hound

Practical Electronics Learning with DIY. Practical Experiments forge the book, college or web learning into a Skill - Visit Hobby Lobby - DIY Conference

Search This Blog

Sunday, May 16, 2010

Complete Pro 3 axis CNC kit

Kit 601: Complete Professional 3 axis CNC kit: Complete kit for Hobby application, use this kit to gain time on your hobby transformations or DIY milling machines

Complete Pro 3 axis CNC kit

Complete Pro 3 axis CNC kit

Badog Switzerland

They manufacture a high-tech precision, rigid CNC mill/engraver for the price of a CNC engraver.

Updated - Oct 2013

Saturday, May 15, 2010

Audio Consulting Switzerland

Audio Consulting Switzerland

Specialists in very high quality audio, Designs Amplifiers, Preamplifier, Phono Preamplifier and R-evolution Turntable etc.

Adapting New Technologies into Classic Hi-Fi systems, without compromising on Decades of Audio tradition.

MITA The Mains Independant Tube Amplifier
SE battery tube amplifier

MITA The Mains Independant Tube Amplifier

Features

Stereo SE 15w / Channel, Three Silver Rock transformers per channel, Fully Lithium battery powered, All silver internal wiring, Veneer to customer's request.

Audio Hi-Fi DIY – Claudio Bonavolta

"Do-It-Yourself … That's the choice I did and the reason you'll find several schematics, mainly for tube electronics, but also some formulas for loudspeakers"

Audio Hi-Fi DIY - Claudio Bonavolta
    Measures Conversion, Electronics, Loudspeakers, RIAA preamps, Solid state MC preamps, Solid state preamps and Solid state amps.

    Audio Hi-Fi DIY - Claudio Bonavolta

    (Proper Loudspeaker Design is more complex than Launching Rockets into the Ocean )

    Tapered Quarter Wave TubeFirst described by Paul Voigt in 1930, TQWTs allow a good quality-to-price ratio. They are also easy to build.Similar to transmission lines, the TQWT is different by its shape, a kind of horn is used as back load but the driver is not placed at the beginning of the cone as usual but on its side.

    In closed boxes, the back wave of the speaker should be completely absorbed (= converted in heat) by the damping material.As the speaker is nearly transparent to sonic waves, if a back wave returns after a reflection on the back wall, some part will also come out through the speaker with some delay giving a not very clean sound.